called magnetic cubes. The agency and the pediatric society have received 10 reports of children accidentally swallowing magnetic balls and suffering injuries to their organs since fiscal 2017.

Here on Hackaday, [Caleb] built a Portal gun which levitated a Companion Cube. Rather than go the magnetic route, [Jacob] levitated a ping-pong ball on a cushion of air. Now, it would be ...

Through their strong magnetism, the balls can be joined together to create different shapes. There are also magnetic cubes. The small size of the balls makes them potential swallowing hazards for ...